pcdttrs(3)
NAME
PCDTTRS - solve a system of linear equations A(1:N, JA:JA+N-1) * X =
B(IB:IB+N-1, 1:NRHS)
SYNOPSIS
SUBROUTINE PCDTTRS( TRANS, N, NRHS, DL, D, DU, JA, DESCA, B, IB, DESCB,
AF, LAF, WORK, LWORK, INFO )
CHARACTER TRANS
INTEGER IB, INFO, JA, LAF, LWORK, N, NRHS
INTEGER DESCA( * ), DESCB( * )
COMPLEX AF( * ), B( * ), D( * ), DL( * ), DU( * ), WORK( *
)
PURPOSE
- PCDTTRS solves a system of linear equations
- or
- A(1:N, JA:JA+N-1)' * X = B(IB:IB+N-1, 1:NRHS)
- where A(1:N, JA:JA+N-1) is the matrix used to produce the factors
stored in A(1:N,JA:JA+N-1) and AF by PCDTTRF.
A(1:N, JA:JA+N-1) is an N-by-N complex
tridiagonal diagonally dominant-like distributed
matrix. - Routine PCDTTRF MUST be called first.